A New One/Two-Dimensional Model of the Conjugate Heat Transfer in Waterwall Tubes of the Supercritical Steam Boiler Combustion Chamber

The heat transfer from the surface of a circular cylinder into a crossflow has been computed using a two-dimensional model, for a range of Reynolds numbers from Re=200 to 15550. The boundary-layer separation, the local and overall heat-transfer rates, the eddy- and flare-detachment frequencies and the width of the flares were determined from the numerical simulations. In this range of Reynolds numbers, the heat-transfer process is unsteady and is characterized by a viscous length scale that is inversely proportional to the square root of the Reynolds number. To ensure uniform numerical accuracy for all Reynolds numbers, the dimensions of the computational mesh were selected in proportion to this viscous length scale. The small scales were resolved by at least three nodes within the boundary layers. The frequency of the heat flares increases, and the width of each flare decreases, with the Reynolds number, in proportion to the viscous time and length scales. Despite the presence of three-dimensional structures for the range of Reynolds numbers considered, the two-dimensional model captures the unsteady processes and produced results that were consistent with the available experimental data. It correctly simulated the overall, the front-stagnation and the back-to-total heat-transfer rates.

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Heat Transfer Characteristics of Two-Dimensional Model of Parallel Louver Fin

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B ◽

10.1299/kikaib.55.2457 ◽

1989 ◽

Vol 55 (516) ◽

pp. 2457-2464 ◽

Cited By ~ 2

Author(s):

Kenjiro SUZUKI ◽

Tetsuro HAYASHI ◽

Matthew J. SCHUERGER ◽

Atsuo NISHIHARA ◽

Masakatsu HAYASHI

Keyword(s):

Heat Transfer ◽

Two Dimensional ◽

Dimensional Model ◽

Heat Transfer Characteristics ◽

Transfer Characteristics ◽

Two Dimensional Model

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Two-dimensional model of heat transfer in circulating fluidized beds. Part II: Heat transfer in a high density CFB and sensitivity analysis

International Journal of Heat and Mass Transfer ◽

10.1016/s0017-9310(02)00528-8 ◽

2003 ◽

Vol 46 (12) ◽

pp. 2193-2205 ◽

Cited By ~ 13

Author(s):

D Xie ◽

B.D Bowen ◽

J.R Grace ◽

C.J Lim

Keyword(s):

Heat Transfer ◽

Sensitivity Analysis ◽

Fluidized Beds ◽

High Density ◽

Circulating Fluidized Beds ◽

Two Dimensional ◽

Dimensional Model ◽

Two Dimensional Model

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Two-dimensional model of heat transfer in circulating fluidized beds. Part I: Model development and validation

International Journal of Heat and Mass Transfer ◽

10.1016/s0017-9310(02)00527-6 ◽

2003 ◽

Vol 46 (12) ◽

pp. 2179-2191 ◽

Cited By ~ 18

Author(s):

D. Xie ◽

B.D. Bowen ◽

J.R. Grace ◽

C.J. Lim

Keyword(s):

Heat Transfer ◽

Fluidized Beds ◽

Model Development ◽

Circulating Fluidized Beds ◽

Two Dimensional ◽

Dimensional Model ◽

Two Dimensional Model ◽

Development And Validation

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2D Model of Transfer Processes for Water Boiling Flow in Microchannel

ChemEngineering ◽

10.3390/chemengineering5030042 ◽

2021 ◽

Vol 5 (3) ◽

pp. 42

Author(s):

Valery A. Danilov ◽

Christian Hofmann ◽

Gunther Kolb

Keyword(s):

Heat Transfer ◽

Experimental Data ◽

Temperature Profiles ◽

Two Dimensional ◽

Dimensional Model ◽

Transfer Processes ◽

Two Dimensional Model ◽

Boiling Flow ◽

Homogeneous Mixture Model ◽

2D Model

The modeling of transfer processes is a step in the generalization and interpretation of experimental data on heat transfer. The developed two-dimensional model is based on a homogeneous mixture model for boiling water flow in a microchannel with a new evaporation submodel. The outcome of the simulation is the distribution of velocity, void fraction and temperature profiles in the microchannel. The predicted temperature profile is consistent with the experimental literature data.

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